exception while write to registry

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VB

Hi,

I am try yo make my application autostart when windows start. It works fine on windows XP but gives me error "Attempt to perform an unauthorized operation" on Windows 7 Professional 64B, Window Vista Ultimate 32B and Window Vista Business 32B

I am using below code:

Try
      Dim regKey As RegistryKey
      regKey = Registry.LocalMachine.OpenSubKey("SOFTWARE\Microsoft\Windows\CurrentVersion\Run", True)

      If MyAppsCheckBox.Checked = true Then
        regKey.SetValue("MyApp", Application.ExecutablePath.ToString())
      Else
        regKey.DeleteValue("MyApp", True)
      End If
      regKey.Close()
    Catch ex As Exception
      msgbox(ex.Message)
    End Try

I am unable to find the solution for above problem.
Please help